No one knows for sure when the first people arrived in ____

No one knows for sure when the first people arrived in ____ no one really knows exactly when the first people arrived in 英语翻译（1）No one knows for sure when advertising first started. no one knows for sure what use can be made of the computer i no one but" wrong" way corrigan knows for sure翻译 英语 no one knows for sure, and making prediction Exactly when the first people arrived in what we nom know as Exactly when the first people arrived in what we now know as In Russia people should________ when they meet for the first The meeting _______ for five hours.No one knows when it will 填词 no one knows for s________ what really happend in the acc shouzhimutiankong when the first arrived in the island,they